Just learning business can someone give me lessons for the south usa.

Hi im new to this business, I have 30 customers I have recently just got my liscense to sprayin Oklahoma, Can someone tell me what is a good rule of thumb to spray what chemicals at this time in oklahoma. I realize it will be a preemergent but what kind Im pretty sure I should use pendamethalon and some triamic but I want to be sure. Thanks for all the help.......could some one please respond